Chinese Journal of Ship Research, Volume. 18, Issue 2, 97(2023)

Characteristics and calculation method of sound radiation of cylindrical shell with porous sound-absorbing material under acoustic excitation

Xinmei YANG1, Meixia CHEN1, Yinglong ZHAO2,3, and Wenkai DONG1
Author Affiliations
  • 1School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  • 2Institute of Noise and Vibration, Naval University of Engineering, Wuhan 430033, China
  • 3National Key Laboratory on Ship Vibration and Noise, Wuhan 430033, China
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    Figures & Tables(17)
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    • Table 1. Calculation methods for vibration and sound radiation of cylindrical shell with porous sound-absorbing material

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      Table 1. Calculation methods for vibration and sound radiation of cylindrical shell with porous sound-absorbing material

      方法描述
      方法1有限元方法,通过COMSOL软件中的多孔介质声学模块,实体构建出多孔吸声材料层,设置计算模型的材料孔隙率、流阻率、粘滞特征长度、热特征长度和曲折因子等各项参数
      方法2在有限元模型的基础上加入1.1节所述等效流体理论的各项公式,通过公式变量的形式得到吸声材料层的动态密度和动态声速
      方法3结合1.2节所述多层介质传递矩阵和1.1节所述等效流体理论方法,得到吸声材料层的吸声系数曲线,在COMSOL软件中构建吸声系数函数,使其作为阻抗边界附加在圆柱壳内壁上
    • Table 2. Parameters for porous sound-absorbing material and internal flow field

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      Table 2. Parameters for porous sound-absorbing material and internal flow field

      参数数值
      空气密度${\rho_0}/({\text{kg} } \cdot { {\text{m} }^{ - 3}) }$1.21
      空气声速${c_0}/({\text{m} } \cdot { {\text{s} }^{ - 1}) }$343
      多孔吸声材料静态流阻${R_{\rm{f} } }/{(\rm{N} }\cdot{\text{s} } \cdot { {\text{m} }^{ - 4}) }$24 000
      多孔吸声材料普朗特数${N_{{\rm{pr}}} }$0.702
      多孔吸声材料孔隙率$\sigma $0.95
      空气的比热容率${\gamma _{\rm{s}}}$1.4
      大气压${P_0}/{{\rm{Pa}}}$101 320
    • Table 3. Parameters for two kinds of porous sound-absorbing material and internal flow field

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      Table 3. Parameters for two kinds of porous sound-absorbing material and internal flow field

      参数多孔吸声材料1多孔吸声材料2
      多孔吸声材料静态流阻${R}_{ {\rm{f} } }/({\rm{N} }\cdot\text{s}\cdot {\text{m} }^{-4})$24 00042
      多孔吸声材料普朗特数${N_{{\rm{pr}}} }$0.7020.702
      多孔吸声材料孔隙率$\sigma $0.950.95
      空气的比热容率${\gamma _{\rm{s}}}$1.41.4
      大气压${P_0}/{\rm{P}}{ {\text{a} }_{_{^{^{} } } }}$101 320101 320
    • Table 4. Calculation schemes for cylindrical shell with three-layer sound-absorbing material

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      Table 4. Calculation schemes for cylindrical shell with three-layer sound-absorbing material

      方案吸声结构敷设顺序(第3层+第2层+第1层)
      方案110 mm空气背衬层+20 mm吸声材料2
      方案210 mm空气背衬层+10 mm吸声材料1+10 mm吸声材料2
      方案310 mm空气背衬层+10 mm吸声材料2+10 mm吸声材料1
      方案410 mm空气背衬层+20 mm吸声材料1
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    Xinmei YANG, Meixia CHEN, Yinglong ZHAO, Wenkai DONG. Characteristics and calculation method of sound radiation of cylindrical shell with porous sound-absorbing material under acoustic excitation[J]. Chinese Journal of Ship Research, 2023, 18(2): 97

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    Paper Information

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    Received: Sep. 7, 2021

    Accepted: --

    Published Online: Mar. 20, 2025

    The Author Email:

    DOI:10.19693/j.issn.1673-3185.02518

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